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Hacking The Brain With Electricity: Don’t Try This At Home | NPR

That’s what Jared Seehafer did. He’s a 28-year-old medical device consultant in San Francisco who heads the group.

He made his own tDCS machine using an elastic headband and a couple of electrodes. It’s powered by a 9-volt battery and produces 1 to 2 milliamps of electricity, approximately what it takes to light one small LED bulb.